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Window.Activated Event

Occurs when a window becomes the foreground window.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public event EventHandler Activated
<object Activated="EventHandler" .../>

A window is activated (becomes the foreground window) when:

  • The window is first opened.

  • A user switches to a window by selecting it with the mouse, pressing ALT+TAB, or from Task Manager.

  • A user clicks the window's taskbar button.

Windows that need to detect when they become activate can handle the Activated event.

After a window is first activated, it may be deactivated and reactivated many times during its lifetime. If an application's behavior or state depends on its activation state, it can inspect IsActive to determine which activation state it's in.

An application can also be Activated.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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